Evidence map›Paper›PMID 23508818›Full record

ArticleSurgical endoscopy2013

The multiphasic learning curve for robot-assisted rectal surgery.

Kevin Kaity Sng, Masayasu Hara, Jae-Won Shin, Byung-Eun Yoo, Kyung-Sook Yang, Seon-Hahn Kim

Abstract read
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In one paragraph

Article in Surgical endoscopy, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 80 papers, 7 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
80citing papers in PubMed, 7 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

80 citing papers in PubMed, 7 syntheses or guidelines pooled it.

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  6. Learning curve in robotic rectal cancer surgery: current state of affairs.International journal of colorectal disease · 2016
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20 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Kevin Kaity SngColorectal Division, Department of Surgery, Korea University Anam Hospital, Korea University College of Medicine, 126-1, Anam-dong 5 ga, Sungbook-gu, Seoul 136-705, Republic of Korea. k_k_sng@hotmail.com
Masayasu Hara
Jae-Won Shin
Byung-Eun Yoo
Kyung-Sook Yang
Seon-Hahn Kim

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRobotic rectal surgery is gaining in popularity. We aimed to define the learning curve of an experienced laparoscopic colorectal surgeon in performing robot-assisted rectal surgery. We hypothesized that there are multiple phases in this learning process.

methodsWe performed a retrospective analysis. Consecutive patients who underwent robot-assisted rectal surgery between July 2007 and August 2011 were identified. Operating times were analyzed using the CUSUM (cumulative sum) technique. CUSUMs were model fitted as a fourth-order polynomial. χ(2), Fisher's exact, two independent samples t test, one-way ANOVA, Kruskal-Wallis, and Mann-Whitney tests were used. A p value of <0.05 was considered statistically significant.

resultsWe identified 197 patients. The median (range) total operative, robot, console, and docking times (min) were 265 (145-515), 140 (59-367), 135 (50-360), and 5 (3-40), respectively. CUSUM analysis of docking time showed a learning curve of 35 cases. CUSUM analysis of total operative, robot, and console times demonstrated three phases. The first phase (35 patients) represented the initial learning curve. The second phase (93 patients) involved more challenging cases with increased operative time. The third phase (69 patients) represented the concluding phase in the learning curve. There was increased complexity of cases in the latter two phases. Of phase 1 patients, 45.7% had tumors ≤7 cm from the anal verge compared to 64.2% in phases 2 and 3 (p = 0.042). Of phase 1 patients, 2.9% had neoadjuvant chemoradiotherapy compared to 32.7% of patients in phases 2 and 3 (p < 0.001). Splenic flexure was mobilized in 8.6% of phase 1 patients compared to 56.8% of patients in phases 2 and 3 (p < 0.001). Median blood loss was <50 ml in all three phases. The patients in phases 2 and 3 had a longer hospital stay compared to those in phase 1 (9 vs. 8 days, p = 0.002). There were no conversions.

conclusionAt least three phases in the learning curve for robot-assisted rectal surgery are defined in our study.

Indexed as

Learning CurveAdultAgedAged, 80 and overFemaleHumansLaparoscopyMaleMiddle AgedOperative TimeRectal NeoplasmsRetrospective StudiesRoboticsTreatment Outcome

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Read underepoch 390

Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.